2. If our theories about the Singularity are true, by the time our light reaches other stars, within another 1000 years or so we'll be roaring in on starships, running self replicating machinery that systematically converts all matter into more useful products. The presence of post-singularity humanity will be completely impossible to miss. Thus, the reason we cannot see other civilizations doing the same thing is because we are the first one in our region of space.
In formal logic false=>x for every x, so if you start a phrase taking the singularity theory as true, that phrase has zero meaning.